you never had your car. >> "fast and furious" was paul walker's most famous movie. tonight, in a sad coincidence, police believe speed killed him and retired race car driver, roger. >> a photo shows walker next to the car just before he left a charity event and minutes before the deadly accident. mark shows us how he's being remembered by friends and the film industry. >> reporter: paul walker's "fast and furious" co-star was among those grieving in a makeshift memorial. it was in the same location where a day earlier, a firy crash killed him and his friend. >> they tried everything they could to get him out of the car. they couldn't. there was nothing they could do. >> reporter: walker seen here alongside the sports car minutes before the crash before leaving a fund-raiser. >> he connected with so many people, young and old. paul never thought anybody was beneath him. >> reporter: walker and his "fast and furious" co--stars made a video. filming had been slated to continue this week with the movie in theaters next summer. now, film makers face unexpected challenges